• We are pleased to announce that the winner of our Feedback Prize Draw for the Winter 2024-25 session and winning £150 of gift vouchers is Zhao Liang Tay. Congratulations to Zhao Liang. If you fancy winning £150 worth of gift vouchers (from a major UK store) for the Summer 2025 exam sitting for just a few minutes of your time throughout the session, please see our website at https://www.acted.co.uk/further-info.html?pat=feedback#feedback-prize for more information on how you can make sure your name is included in the draw at the end of the session.
  • Please be advised that the SP1, SP5 and SP7 X1 deadline is the 14th July and not the 17th June as first stated. Please accept out apologies for any confusion caused.

Question 12.18 pg-552

  • Thread starter imgauravgoel@gmail.com
  • Start date
I

imgauravgoel@gmail.com

Member
For calculating DOF we are doing 3-1-1=1 and it says as we have estimated 1 parameter. If we estimate 2 parameters in some other case we would have subtracted 2 after we had subtracted 1 from the number of groups to find DOF.

Secondly, Why are we using 0.5% value not 5% here?
 
Yes, to your first part.


The question doesn't ask you to test at the 5% level. The solution uses 0.5% level for the testing. You can re-do the solution at the 5% level and get the same conclusion.

The point made here is that as the chi-square value is so large that we can reject the null hypothesis even at 0.5% level.
 
You must log in or register to reply here.
Back
Top